Air heater



April 22, 1930. PARKER 1,755,268

AIR HEATER Filed Feb. 25, .1929

INVENTOR Donald Par]; er

ATTO R N EY characters of reference on the drawings, the

Patented Apr. 22, 1930 DONALD PA ER, or ransivq eitmbema v i "AIR name's 1 *A puc'afibn fiiea rb nfalyfaei 192a Serial 42,014.

This invention relates to heating devices,

I the'principal object being to provide an ap I paratus of this general character, especially designed V and adapted'for orchard heating 7 which is so constructed as to obtain the maximum. heating efficiency from a" minimum amount of fuel; and'so that the; majority of the air as heated will be deflected'dOwnWardly and away from the heater.- This is adesirable feature since "air" as heated naturally tends to rise and if too far above the ground at the'outset, the practical value and utility i description.

A further object of the invention isto pro-l duce a simple and inexpensive device and'yet. one which will be exceedingly efiective for of-the heated air largely nullified.

' Though as stated, theheater is designed primarily for orchard heating during frosty 7 weather, it is also suitable for indoor heating,

as will be evident from the accompanying the purpose for which it is designed i ,The'seobjects I'accomplishby means of.

such structure'and relative arrangement "of parts 'as will fully appear by a perusal of the following specification andclaiins. I 1

In the drawingssimilar characters ofreference indicate corresponding parts in the arranged for orchard use;

air deflecting plates;

several'views': r

Fig. lfls a side elevation of my heater as FigrQ is a top planview of the heater.

Fig. 3 is a fragmentary enlarged section showing a fine pipe and an air deflecting plate associated therewith; I

4 is a diagrammatic vertical section showing the preferred arrangement of the Referring now-more particularly to the numeral 1 denotesa firebox'to rest on or ad jacent the ground and having air intake openings 2 of suitable character and size. A

burner conventionally indicated at 3 is mourit-v ed centrally in the firebox. This burner for orchard use is of a type adapted to burn fuel oil, while for house or other interi'or'use it would be of a type to burn gas Theinecessary feed pipe 4 for. theburner of course pro- "distance from eachjother and terminatein jects outwardlyifrom'the firebox to necessarysource of fuel supply (not-shown).

The discharge or flue pipe 5 for'the products of combustion from theburner. pro ects upwardly irorn'the firebox and, a Sl'lOIlldiSjtance above said box-is arranged inthe form of a coil 6v having any desired pitch and mum bericof turns, which are 'SPZLCGCl'QpaI't SOIHE an i upwardly projecting stack or final discharge outlet .7. Thefflue and coil are preferably made of. ordinary stove piping and fittings so that the coil is substantially :in form as shown; with each side'of a turns-of the coil straight and set at a slope to the-ad j acent side; V

rrssociatedwith such straight side of the coil and extending from end tokend ofsaid side is a horizontal'deflecting plate 8, the ends of which are cut onaninward bevel from the outer' tothe inner edges ofthe plate.

Each plate has a transverse'iconcave cxzrva ture'relative to the turn of the flue-coil thereunder, the inneredge of thexplate being disposed-inwardly of the innerside of the coil a considerable distance and being lowerithan; the, top :of said' turn and also lowerzthan the outer edge of the plate, which latter edge is also some distance outwardly side of the coil. V

-The plates 8 being all horizontally disposed whilevrthe coil turns -areslop'i-ng, each-plate of the; F outer 7 c contacts with the straight length of :the" coil which it overhangs atone end, while being 7 V spaced from the same at the otherend; The

by is gradually decreased froin bottom' totop, so-thatatj-thej topmost layer of ;-plates,-;;the

,insidejthericoilispracticallyvertical passage closed. :A a e u tio f thisrair clefiecting.-.arra ge- 7 from such detail may be resorted to as do flected downwardly and away from the immediate vicinity of the heater, due to the.

curvature of the plates.

This not only prevents the air from goe ing straight up to the top of the heater inside the area surrounded by the coil as would otherwise be the case and where it would be' largely wasted, but causes such air to come into contact with a larger portion of the area oi the heated pipe than it otherwise would, thus more thoroughly heating the air. At the same time the heated air as discharged from the heater is caused to be deposited close to the ground. This arrangementalso causes the heated air to be discharged over a considerable area surrounding the heater.

To support thedetlecting plates I provide rigid uprights 9 at the corners of the pipe coil, to which the ends oi the various plates are connected, as shown in Fig. 3.

These uprights also support cradles 10 which project inwardly and support the coil at the bends or corners of the turns.

When used in an orchard some of the products of combustion from the burner may be discharged some dist'ance aw'ay fromthe heater, as at points adjacent separated trees, by auxiliary titles 11 projecting atan upward slant from the main line 5 between'the fire box and coil. For interior use such auxiliary flues of course would be omitted.

From the foregoing description it will be readilyseen that I have produced such a device as substantially fulfills the objects of the inventionas set forth herein.

vWhile this specification sets forth in del tall the present and preferred construction of the device, still in practice su ch deviations not form a departure from the spirit of the invention, as defined by the appended claims.

' Having'thus described my invention what I claim as'new and useful anddesire to secure by Letters Patent 1s:

1. An air heaterincludlng a firebox, a

source of heat therein, and a discharge flue projecting upwardly from the firebox in the form of a vertical helical coil exposed all around to the atmosphere, the turns of which are spaced from each other an'd'from'the firebox and "means associated with the coil for causing air passing between the firebox and the coil and moving upwardly inthe area included by said coi'l'tobe caught and deflected outwardlyof the heater between the turns of the coil.

2. An air heater including afirebox, a

source ofheat therein, a discharge flue projecting upwardly from the firebox in the form of a vertical helical coil exposed all around to the atmosphere, the turns of the coil being spaced from each other and from the firebox, and an air deflecting plate structure mounted in connection with the coil in spaced relation to and projecting between the turns thereof, said plates in cross section be curved concavely relative to the coil-turns ther'e'belowand'havlng their lnner edges some distance inwardly of the coil and their outer edges some distance outwardly of the coil.

3. An; air heater including a firebox, a source of heat therein, a discharge flue projecting upwardly from the fireboxin the form of a vertical helical coil, the 'tlurns ofthe coil beingspaced from each other and from the firebox, and are of substantially rectangular form, and horizontal air'defiecting plates proj ecting between'the turns of the coil, there being one suchplate for each side of a coil-turn and the different plates being arranged in stepped relation; each plate being spaced at one end fromthe coil-turn immediately below and being arranged to catch air passing up in the area surrounded by the coil and deflect such air overthe top of thecorresponding coil-turn and then'downwardly on the outside ofthe coil. v V V 4; An air heater including a firebox, a source of heat therein, a discharge flue pro-- j ecting upwardly'from the firebox in the form of a vertical helical coil exposed all around to the atmosphere, thetu'rns of the coil being spaced from each other and from the firebox, an air deflecting plate structure-mounted in connection with the coil in'spaced relation to and projecting between the turns thereof, said 7 opening included between .the inner edges of i the plates at each turn of the coil is gradually decreased in size from bottom to top of the coil; V V

In testimony whereof I affix my signature.

DONALD PARKER. 

